qt-demo-init-v1.1: remove tslib as we can use linux touch event directly

As we are use capticive touch, there is no need for tslib. Just remove
it.
Use touchscreen evdev directly.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
atmel-qt5-demo-image: remove tslib features

Signed-off-by: Josh Wu <josh.wu@atmel.com>
atmel-qt5-demo-image: add post process command to remove tslib plugin in qt app scripts

Signed-off-by: Josh Wu <josh.wu@atmel.com>
qt-demo-init-v1.1: support mouse support

Signed-off-by: Josh Wu <josh.wu@atmel.com>
at91bootstrap: use 3.7.1 revision for all boards

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>